Half to asaph t



(No Model.)

0. V. HENRY.

GAS FURNACE;

No. 373,018. Patented Nov. 8, 1887.

'UNITED STATES PATENT Fries.

CHAR-LES V. HENRY, OF PITTSBURG, PENNSYLVANIA, ASSIGNOROF ONE- HALF TO ASAPH T. ROWAND, OF SAME PLACE.

GAS-FURNACE;

SPECIFICATION forming part of Letters Patent No. 373,018, dated November 8, 1887.

Application filed October 28, 188th Serial No. 217,382. (No model.)

To all whom, it may concern.-

Be it known that 1, CHARLES V. HENRY, residing at Pittsburg,in the county of Allegheny and State of Pennsylvania, a citizen of the United States, have invented or discovered certain new and useful Improvements in Gas- Furnaces, of which improvements the following is a specification:

. In the accompanying drawings,which make part of this specification, Figure 1 is a central vertical section of my improved gas-furnace.

' Fig. 2 is a horizontal section on the line x x,

which the gas and air are admitted, thereby stopping the flow of gas into the cupola. The stoppage of the flow of gas will result in a chilling of the metal ,thereby necessitating the tearing down of a portion or all of the cupola to remove the chilled mass.

The object of the invention herein is to so construct the furnace as to provide passages or fines for the flow of gas, such flues being so located with reference to the support for the charge that they will not be liable to become clogged or stopped by molten metal; and, in general terms, the invention consists in the construction and combination of parts substantially as hereinafter more fully described and claimed.

The furnace or cupola 1 is of the usual form and construction, having the crucible 2 at its lower end, the bottom of said crucible being formed by the drop-door 3, said door being lined on the inner side with fire-clay,as shown. At the upper edge of the crucible is formed a shoulder or 1edge,4,on which are supported the wed ge-shaped blocks 5,having their inner edge cutaway, as shown,thereby forming, when said blocks are arranged within the cupola, an

arched cover for the crucible 2. One side of each block is cut away for a portion of its width,

thereby forming, when the blocks are placed together in the cupola,passages 6, connecting the crucible and the upper part of the cupola. A shallow basin is formed in the upper sides of the blocks by inclining the upper surface of each block from its outer perimeterto its inner end. The central opening, formed by the excised ends of the segmental blocks 5, when placed within the furnace, is closed by a fireclay plug, 7, as shown in Fig.1. The fire-bricks formingtheinnerliningofthefurnaceareso cut or otherwise shaped on their inner surfaces as to form a series of longitudinal grooves, 8, around the inner wall of the furnace. These grooves 8 extend down behind the blocks 5 to a metal or fireclay ring or annulus, 9, incorporated with the lining of the furnace at a point about mid way of the height of the blocks, and provided on its inner face with a groove, 10. A pipe, 11, connects the groove 10 with the miXing-chamber12, into which gas and air are introduced by suitable pipes in suitable quantities and under suitable pressure. The groove 10 is placed in communication with the crucible 2 by means of notches 13 cut through ribs 14, formed by cutting away a portion of one side of the blocks 5, as above stated.

In using myimproved furnace the pig metal or ore to be treated is placed upon the perforated bridge or partition formed by the blocks 5. Combined gas and air are then admitted or forced into the groove 10, from which it passes by the notches 13 and passages 6 into the crucible and also into the part of the furnace above the bridge or partition formed by the blocks 5, by the grooves 8, and by the passages 6. In this manner the charge 011 the blocks is subjected to a direct impact of the flames, not only at the sides, but also at the bottom. As the metal begins to soften and melt,it will flow down the sides of the shallow basin formed by theinclined upper'surfaces of the blocks,and as soon as it becomes sufficiently fluid will run-down the passages 6 into the crucible. In case the metal should,whileina pasty or semi-molten state, settle down upon the blocks and close and partially close the passages 6, sufficient gas will be supplied by the grooves 8 to complete the melting operation, assisted by the intense heat generated in the crucible. The inclined sidesof the basin in the uppersurface of the blocks 8 will cause the metal to flow toward the center of the furnace and thereby keep the grooves S from being clogged by molten or semi-molten metal.

Although I have described my improvements in connection with a cupola or melting furnace, they are equally applicable to ablastfurnace for the reduction of ores.

I claim herein as my inveutiou l. A eupola-furnace havinga horizontal partition, thereby forming a chamber at thelower end of the cupola, said chamber serving as a crucible for the reception of molten metal and as a combustionchamber, said partition being provided with a series of passages for the dis charge of molten metal into the crucible and the passage of the products of combustion from the crucible, in combination with a series of tuyeres for conducting and discharging combined gas and air into the crucible, substantially as set forth.

2. The combinatiomwith a furnaceofa crucible formed in the lower end of the furnace, of a series of segmental blocks arranged above the crucible and serving as a support for the charge ofmetal,saidblocksbeinggroovcd,asdescribed, thereby forming passages leading from the erucible to the upper part of the furnace, and a ,series of two or more tuycres for conducting and discharging combined gas and air into the crucible, substantially as set forth.

3. The combination, with a furnace having its inner Wall grooved, as described,of a crucible formed in the lower end of the furnace, a perforated partition arranged above the crucible and serving as a support for the charge,and a series of two or more tuycres for conducting and discharging combined gas and airinto the crucible and the longitudinal grooves in the wall of the furnace, substantially as set forth.

4. The combination, with a furnace having its inner wall grooved,as described, of a crucible formed in the lower end of the furnace, a perforated partition arranged across the furnace above the crucible and having a concaved upper surface, and a series of two or more tuycres for conducting and discharging combined gas and air into the crucible and thelongitndinal grooves in the wall of the furnace, substantially as set forth.

In testimony whereofI have hereunto set my hand.

CHARLES V. HENRY.

\Vitnesses:

DARWIN S. WoLcorT, W. B. CoRWIN. 

